Roller bearing



Patented Aug. 21; 1945 A UNITED ROLLERABEARING Nicholas Medved,Cleveland, Ohio My presentinvention embodiesimprovements in doublethrust roller bearings of the type generally disclosed in my UnitedStates Patent No.

1,885,852, issued November- 1, 1-932, and particu larly'the constructionof bearing depicted in Figures 3. and :4 of said patent.

In the prior construction of bearing of my patout as above referred to,the roller bearlngcomprises tapered end rollers in spaced relationdisposed to resistthrust loads from either direction, and intermediatecylindrica rollers rendering the bearing especially adapted.forresisting not only the thrust loads from either direction, but largeradial loads. The said prior construction avails of reducedtaperedbearing members or elements at the ends of the cylindric rollers,jthe=same entering shallow bearing sockets in the end tapered rollers, thecooperation of the said rollersaffording asubstantial reduction intheifriction resuiting from the operation of the same, "and"particularly: that friction which is derived from direct and componentthrust loads:

Now, while the said prior bearing construction as designed by me hasbeen found serviceable and" practical inlighter'beari-ng units where thesame is used; for heavy duty units the tapered bearmg members of thecylindri'c rollerskhave a tendci'ency o fthe bearing ency to break downand thus destroy the ere-1' In view of the foregoing difilcultyofpractice of my priorinventions as adapted to heavy bearing structures, Ihave re-designed said bearingac cording to the improvements or' thepresent invention in such a manner asto provide the in-' termediatecylindrio bearing rollers withend spherical bearing sockets to receivecomplemented: end bearing members" at the inner end-s ofthe L tapered orend rollers, and I have formedthe said end bearingri'nembers or: thetapered rollers with the partioularobject of not only providingspherical bearing sockets-t o fthe cylindric rollers, but said endbearing members have been additionally'formed so as to gradually enlargefrom the actualspherioal bearing ends of the members to the point wherethe bearing members merge into the periphery of the tapered rollers. Bysuch construction I obtain a strengthened formation i of the bearingmembers of the tapered rollers such that these members do not break downor" Application November 26, 1943; Serial No. 511,830.

3 Claims. (or toe-214) present invention for facilitating the properemplacement of" the bearing rollers in relation to the inner 'and outerraccways engaged by said rollers and commonly foundin beari'ng unitsofthe type of m'y'invention... The said improved cageis designed fortheproper spacing of the bearing rollers both circumferentially andaxially V of the units. i

Afull understanding of my present improvements will be had by referenceto the accompanye ing detail descriptionand the attacheddrawil'1g,iIlWhiCh p Figure 1 is a transverse vertical section of myimproved form of roller 'bearing.

Figure 2is a sectional view of a portion of the cage including theaxially disposed spacer plates and the inner spacer rings united theretoby a peculiar bent disposition of the ends of said plates.

Figure s'is an isometric perspective view of the assembledbearingcageemployed for the purposes of the present invention.

Figure 4 is an enlarged fragmentary detail view of the cooperatingbearing parts of the yllndric and tapered rollersshowing a clearancephase of the construction.

.In addition to :the following description reference is made to myLetters Patentpreviously referred to, to facilitate an. understanding ofthe advantages of my presentbearing unit and the specific action of theroller elements thereof ,as presented inthe said patent, since the saidadvantages are substantially those presented inthe prior art disclosurereferred. to. y I

A detail description of my present bearing is now supplied by directreference tothe construction disclosedin the accompanying drawing. Itwill be seen that rny improved bearing, unit includes the inner sleeve Iprovided at" its opposite sides with the cones or raceways 2 disposedopposite and spaced from the outer bearing sleeves or cups 3..Intermediate the cones or raceways 2 the sleevel is formed with the race45 way 4 to receive for rolling contact therewith the cylindricrollersie Opposite the raceway 4 is the intermediate sleeve 6 having theraceway 1 which surroundsthe rollers 5 at the outer sides thereof.Thesleeve 6 is held in properly spaced relation to the cups or racewaymembers 3 by end projections 8 formed at the. opposite side edges of themember 6 and located at intervals-along said edges which are annularinview of the circular form of themernbers 6. Suitable oil holes 9 maybe provided in the spacing projections 8 and register withsimilar oilholes in the housing or metal casing II] which generally encloses theentire bearing unit.

Tapered rollers I I for resisting the thrust loads of the bearing areprovided and located intermediate the inner raceway surfaces of thesleeves or cups 3 and the outer conical raceway surfaces 2 of the innersleeve l of the bearing unit.

For providing bearing engagement between the cylindric rollers and thetapered rollers I I, the rollers. 5 at the ends thereof are formed withspherical sockets 5a centrally located in the said ends and therebysubstantially concentric with the axis of the rollers 5. Additionally,the tapered rollers I I at their inner ends are peculiarly formed toprovide the spheric bearing members Ila, which bearing members enter thesockets or bearing recesses 5a of the cylindric rollers 5. The bearingmembers Ila are virtually terminal members of symmetrically tapered endextensions III) at the end or ends of the said rollers'II. In otherwords, the formation of themetal structure of each roller II at itsinner portion provides .the spherical bearing members Ila constitutingextremities of the tapered end extensions I lb which virtually involveoutward prolongations of the members Ila of increasing diameter from thebearing surfaces of the parts Ila to the adjacent end of the peripheralportions of the rollers II. By this construction, a considerable body ofmetal joins the bearing members Ila with the tapered body portions ofthe rollers I I, and this has been found in practice to remedy thedifliculty of breakage or crushing of the bearing members as used in myprevious patented structure incident to the thrust and radial loadswhich are carried by the bearing under actual conditions of service.

For properly positioning the rollers 5 and II.

in longitudinal relation and for assisting in properly s-pacing eachseries of such rollers from the next adjacent series circumferentiallyof thebearing, I avail of a cage structure. This cage structure is seenbest in the drawing, especially in Figure 3, and comprises the axiallydisposed plates I2 which are notched at In at their inner edges toreceive the spacer rings 13'. The spacer rings I3 are provided atintervals at their inner peripheral edges with recesses I3a affordingpartial bearings receiving the bearing members Ila.

At the opposite ends or series of axially disposed plates. I2 areprovided bearing rings I4 having pressed-in conical centers I4a adaptedto fit into outer end bearing sockets I I0 of the tapered rollers I I.The rings l4 are formed with radial slots at intervals therein, and endprojections IZb on the axially disposed spacing body while hardening,and the area of joinder metal of the bearing member to the roller bodyis so weakened that the breaking and crushing oil of the bearing memberis promo-ted. This creates the problem of maintaining the integrity ofthe roller body metal by forming the same so that when it is made, thestrength is uniform practically throughout the entire body from. oneterminal t the other, something which I have accomplished by my presentimprovements.

The bearing sockets 5a. are so formed in the ends of the rollers 5 thatflat end parts are proplates I2 pass through the said slots and may havetheir outer ends upset or swaged so as to unitethe rings III with theplates I2, thus providing an assembly unit including the parts I2, I3,and I4. In producing this assembly unit, I contemplate forming the slotsI2a in the plates I2 when the said plates are somewhat straighter thanillustrated in Figure 2, and then bending the ends of theplates-inwardly in relation to the middle portions so as to crimp orclamp the walls of the slots I20, against the plates I3, thus to preventany circumferential displacement of the parts I3 in relation to theplates.

By the peculiar construction of the spheric bearing members Ila, joinedas they are to the larger ends of the rollers II by a relative largeamount of metal in the roller end extension I lb,

sisting radial loads; tapered rollers at the ends" vided which extendrectilinearly of the roller 5 and terminate at the peripheral portion ofeach end some distance from the sockets. The shape of the bearing memberI la fitting in each socket is such as to afford a slight clearance atthe outer portion that rolls in the socket, as seen at 5b in theenlarged view, Figure 4. By such provisions the ends of the rollers 5 atthe sockets 5a are prevented from wearing grooves or break age recessesin the sidesof the bearing members 5a, thus enhancing the wear stabilityof the latter members. I

It will thus be observed fromthe foregoing description that I haveprovided a simple and eflicient construction of tapered rollers formingthe outer thrust elements of the bearing unit which cooperates with theintermediate cylindric rollers with great strength at the contactingbearing portions of said parts,.avoiding the disadvantages of myprevious construction as hereinbefore pointed out. Likewise, I haveprovided a simple construction of bearing cage; the parts of which maybe easily assembled and will axially cooperate withthe roller elements,as well as the :bearing sleeves and cones having the raceway surfacesfor the rollers, to maintain the rollers in their proper positionsin'the bearing unit.

If desired, there may be provided between the spaced rollers II,intermediate spacing rollers,

not shown, but such as generally disclosed in my claim as new and desireto secure by Letters Pat-- ent of the United States, is:

1. In a roller bearing of the class described,

in combination, 'an' inner sleeve provided with end raceways orcones'and a straight raceway between said end raceways, end cups-havingouter raceways spacedfrom the raceways or" cones of said sleeve, anouter sleeve intermediate said end cups and having a straight racewaypar:

allel to, and spaced from the straight raceway of the inner sleeve,cylindric rollers'intermediate the outer sleeve and the inner sleeve forre-' of the cylindric rollers and .disposed between the raceways of theend cups and thecones or race-I ways of the-inner sleeve, said cylindricrollers being formed with spherical sockets intheir end portions, andthe said tapered rollers having at their innerends spherical bearingmembers, the

inner ends of the tapered rollers being provided n with end extensionssymmetrically tapered from the inner extremities of their peripheralportions to thespherical bearing members which virtually form the endsof said extensions, so that the body of'the tapered rollers merges fromthe inner bearing periphery to the spherical bearing members to ensureuniform hardening, said inner end bearing members of the taperedrollers: being seated for bearing engagement in the bearing sockets inthe ends of the cylindric rollers.

tremity of the bearing member portion. 1 t

ways of the end cups andt he cones or racewa ys of the inner sleeve,said cylindric rollers being formed with spherical sockets in their endportions, and the said tapered rollers having at their inner endsspherical bearing members, said inner end bearing members of the taperedrollers being seated for bearing engagement in the bearing sockets inthe ends of the cylindric rollers, and a cage cooperating to positionthe .cylindric and.

tapered bearing rollers longitudinally of one anothen and [for spacingsets of such rollers circumferentially of said bearing unit, includingaxially disposed plates spaced from and at the v sidesof eachset ofcylindric and tapered rollers,

3. In a roller bearing of the class described,

in combination, aninner sleeve provided with end raceways or cones and astraightraceway between said end raceways, end cups having outerraceways spaced from the raceways or cones of said sleeve, an outersleeve intermediate said end rings spaced from the ends of the axialplates and inset in slots at the inner edges of said p1ates,said ringshaving spacing recesses engaging the bearing members at the inner endsof the tapered rollers and being clampingly engaged in v the slots; oithe axially disposed plates by bending of the latter to engage saidrings, and outboard Fbearing rings at the;ends of the axially disposedplates connected with such ends and formed with conical centers engagingin bearing cups and having a, straight raceway parallel to l and spaced:from the straightraceway of the inner sleeve,cy1indric' rollersintermediate the outer sleeve and the inner sleeve for resistingradialloads, tapered rollers at the ends of the cylindric rollers anddisposed between the racerecesses the outer ends ofthetapered rollers,

the said bearing rings; and spacer rings being parallel with each otherand circumferential of a the bearing unit, and theaxial plates beingsubstantially parallel witheach other and extending axially of saidunitas well as relatively parallel to each set of longitudinally disposedcylindric rollers and tapered end rollers.

NICHOLAS MEDVED.

